JPH04155646A - Cassette holder unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette holder device that temporarily holds a cassette containing a magnetic tape in order to load the cassette into a predetermined tape drive.

Conventional technology As shown in Fig. 2, a video tape recorder (hereinafter referred to as V
The cassette 3 (referred to as "TR") has a magnetic tape (not shown) wound around a reel built into a rectangular parallelepiped-shaped housing 3c. In front of the cassette 3, a cassette lid 3a is rotatably supported by a support hole 3d provided on the side of the cassette housing 3c. The cassette 3 is installed in a specified tape drive device and performs its original recording and playback functions. At that time, the cassette lid 3a rotates around the support hole 3d in the direction of the arrow, and the internal magnetic chip is turned off. Pulled out onto the tape drive. However, the magnetic tape inside the cassette is protected at the position shown in FIG. 2, and opening and closing operations are restricted by a lock button 5 so that the cassette lid 3a can be easily closed except when necessary.

As shown in FIG. 3, the lock button 5 is supported movably in the direction of arrow B by a bearing (not shown) provided in the housing 3, and is supported by a spring (not shown) of the lock button rotation shaft 5c. ) is attached in the opposite direction to arrow B. The lock button 5 has lock claws 5 and 5b at its tip. In addition, a lock groove 3e is carved into the inner surface of the cassette lid 3a.
The tip of the claw 5b enters the lock groove 3e. Therefore, in the state shown in FIG. 3, the wall of the cassette lid 3a is obstructed by the lock claw 5b and cannot be opened in the direction of arrow A. That is, the opening of the chamber of the cassette lid 3a is locked by the lock claw 5b. When the tip of the locking claw 5a of the locking button 5 is pressed, the locking button 5
rotates in the direction of arrow B around the lock rotation axis 5c. Therefore, the lock claw 5b also has the above-mentioned lock groove.
e, the lock is released and the cassette cover 3a can be opened in the direction of arrow A.

The cassette 3 with the above structure is guided by the upper plate 4b and lower plate 4a of the cassette holder 4 and the left and right side walls as shown in FIG. Being pushed around. Only in this state is the lock button 5 pressed by the pressing means on the outside of the side wall on the cassette boulder, the lock is released, and the cassette lid 3a is opened in the direction of arrow A. The magnetic tape 6 becomes exposed. That is, since the upper plate 4b, lower plate 4a, and left and right side walls, which are the guide parts of the cassette holder 4, are not provided with means for pressing the lock button, the cassette lid 3a at the tip of the cassette 3 passes over the guide post 1o. The structure is such that the lock button will not be pressed until the button is pressed. As shown in FIG. 8, the lower edge of the tape 6 is located above the bottom surface of the cassette 3 by the X dimension.

Problems to be Solved by the Invention In the structure of such a conventional cassette boulder device, the lock button 5 cannot be pressed until the cassette M3a passes over the guide post, and therefore the cassette lid 3a cannot be pressed.
Since it could not be opened, the X-dimensional force set 3 had to be positioned above, as shown in FIG. 8 above. Accordingly, the VTR device becomes larger in the height direction, which is a problem that hinders the miniaturization of VTRs.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cassette holder device that can reduce the size of a VTR also in the height direction.

Means for Solving the Problems In order to achieve the above object, the present invention provides a cassette holder device for holding a cassette, in which the cassette has a rectangular parallelepiped housing containing a magnetic tape, and two opposing sides of the housing. It has a lid rotatably supported by an upper support hole, and a lock button that restricts the opening operation of the lid,
The cassette boulder is made up of upper and lower guide surfaces for holding the cassette and a side wall, and the side wall is located on the side wall of the cassette boulder at a position corresponding to the lock button of the cassette held by the guide surface and the side wall. An opening is provided in the opening, and a pressing lever having a rotation axis parallel to the side wall and capable of pressing the lock button at its tip is disposed in the opening.

Operation In the above configuration, the press lever is pressed against the lock button of the cassette lid while the cassette is inserted into the cassette holder, the opening/closing lock of the cassette lid is released, and the opening/closing cam provided at the tip of the cassette holder partially opens the cassette lid. By opening the guide post, the upper end of the guide post can be brought close to the magnetic tape without colliding with the cassette lid.

Embodiment FIG. 1 fat is a perspective view of a cassette holder 4 and a cassette 3 held in the cassette holder according to an embodiment of the present invention, and FIG. 1 fbl is an enlarged view of the rounded part of FIG. This figure shows a state in which the upper plate 4b of the cassette holder 4 is omitted to facilitate understanding.Also, the same parts as in the conventional example are designated by the same numbers.Cassette holder 4
An opening 4d is provided in a part of the side wall 4c at a position corresponding to the lock button 5 of the held cassette 3. The opening 4d has a first pressing lever 1 and a second pressing lever 2, and their respective rotations Mla and 2a are supported by supports provided on the upper and lower walls of the opening 4d, as shown in FIG. 1 (bl). It is supported by the hole and can be rotated.
A has a tension spring mounting portion 1d.

2d, and a tension spring 7 is applied. tension spring 7
Accordingly, the first pressing lever 1. The second pressing lever 2 is biased so that its tips 1c and 2c move toward the inner surface of the cassette holder 4.

Figure 4 (al, (bl, fcl) to Figure 7 (al,
(bl, (C1 is the cassette 3 in the cassette holder 4)
This shows the state in the middle of being inserted. In each figure (al is the side view, fbl is the arrow -A in the fa1 diagram)
-A is a cross-sectional view, and (C) is an enlarged view of the circle E section of the fbl diagram. The cassette 3 is inserted relative to the cassette holder 4 in the direction of arrow C. FIG. 4 shows the initial state of insertion, in which the first pressing lever 1. Second
Due to the biasing force of the tension spring 7, the pressing lever 2 has a tip 1c,
2c is pressed against the side wall of the cassette lid 3a. As the insertion of the cassette 3 progresses, as shown in FIG. 5, the tip 1c of the first pressing lever 1 or the lock claw 5a of the lock button 5 is pressed to release the opening/closing lock of the cassette lid 3a. On the other hand, an opening/closing cam 8 is formed inside the tip of the side wall 4C of the cassette holder 4, and the lower edge 3f of the cassette lid 3a begins to come into contact with the opening/closing cam 8. When the cassette 3 is inserted further, the first pressing lever 1 stops pressing the lock button 5, but instead the second pressing lever 2 presses the lock button 5.
Press to continue unlocking the cassette lid 3a. When the opening/closing lock of the cassette lid 3a is released, the lower edge 3f of the cassette lid 3a comes into contact with the opening/closing cam 8 to open the cassette lid 3a, as shown in FIG.

As explained above, during the operation of inserting the cassette 3 into the cassette holder 4, the cassette lid 3a becomes partially open.
The lower edge 3f of the lid no longer collides with the guide post 10, so the distance Y dimension between the magnetic tape 6 and the guide post 10 as shown in FIG.
It can be made smaller than the X dimension in the figure. In other words, the X dimension is Y
Since the dimensions can be reduced, the VTR can be made smaller.

In addition, in the above description, an embodiment using two pressing levers, a first pressing lever and a second pressing lever, was described, but in principle, even one pressing lever can perform the function. However, it is more reliable to release the opening/closing lock of the cassette lid 3a by using two pressing levers. Further, in the above embodiment, an example was explained in which the lower edge 3f of the cassette lid 3a comes into contact with the opening/closing cam 8, but instead of the lower edge of the lid, the cassette lid 3a
The opening/closing cam 8 may be brought into contact with another location.

Effects of the Invention As is clear from the above embodiments, the present invention provides a pressing lever on the side wall of the cassette holder, and allows the pressing lever to press the lock button of the cassette lid during insertion of the cassette into the cassette holder, thereby opening and closing the cassette lid. Since the lock is released and the cassette lid is partially opened using the opening/closing cam provided at the tip of the cassette holder, the upper end of the guide post can be brought closer to the magnetic tape without colliding with the cassette lid, allowing the VTR to can be made smaller.

[Brief explanation of drawings]

Figure 1 (al is a perspective view of a cassette holder device according to an embodiment of the present invention, Figure 1 (bl is an enlarged view of the rounded part of Figure 1 (al), Figure 2 is a perspective view of the cassette, The figure is an enlarged perspective view of the cassette lock button, FIG. 4(a) is a side view showing the cassette inserted into the cassette holder, and FIG.
bl is a cross-sectional view taken along the arrow line A-A of al,
Figure tc+ is an enlarged view of circle E in Figure 4 Tbl, Figure 5 (a
), tbl, (C1 to 7 are diagrams explaining the insertion state of the cassette into the cassette holder, and Figure 8 is a diagram explaining the relationship between the cassette and the guide post when a conventional cassette holder is used. 1...First press lever (press lever), 2...
...Second press lever (press lever), 3...
・Cassette, 3a...Cassette lid (lid body), 4
...Cassette holder, 4a...Lower guide surface, 4b...Upper guide surface, 4C...Side wall, 4d...Opening, 5...Lock button, 6...Magnetic tape, 7...Tension spring, 8...Opening/closing cam. Name of agent Patent attorney Haruaki Koba et al. 28 Figure 2 Figure 3 t Figure 4 (IL) (b) Figure 6
36) Figure 7 @) (b)

Claims (4)

[Claims] (1) A cassette consists of a rectangular parallelepiped-shaped housing containing a magnetic tape, a lid rotatably supported by support holes on two opposing sides of the housing, and a lock button that restricts the opening operation of the lid. The cassette holder is comprised of upper and lower guide surfaces for holding the cassette and a side wall, and is located on the side wall of the cassette holder at a position corresponding to the lock button of the cassette held by the guide surface and the side wall. The cassette holder device includes an opening in the side wall, and a pressing lever having a rotation axis parallel to the side wall and capable of pressing the lock button at its tip. (2) A cam surface that comes into contact with one end of the cassette lid is provided on the inner surface of the side wall of the cassette holder that holds the cassette, and when the cassette is inserted into the cassette holder, one end of the lid comes into contact with the cam surface. 2. The cassette holder device according to claim 1, wherein the lid body is opened by moving the lid body. (3) A rotating shaft parallel to the side wall is provided on the side wall of the cassette holder holding the cassette and at a position corresponding to the lid lock of the cassette held by the guide surface and the side wall; The cassette holder device according to claim 1, further comprising a plurality of pressing levers capable of pressing the lock. (4) The cassette holder device according to claim 1, wherein the tip of the pressing lever is urged inward of the cassette holder by a tension spring applied between the two pressing levers.